A Convenient Method for Dihydroxylation of Olefins by the Combined Use of Osmium Tetroxide and Dihydroxyphenyiborane

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Abstract
Cis-Dihydroxylation of olefins with a catalytic amount of osmium tetroxide and N-methylmorpholine N-oxide proceeds smoothly in an organic solvent by the use of dihydroxyphenyiborane, giving the corresponding 2-phenyl-1,3,2-dioxaborolane derivatives (phenylboronic esters) in good yields.